Wait time

  • The time required for the device to produce a desired quantity of safe water that is acceptable to end users.

Key indicators

  • Threshold: the time to treat the volume in the upper container should be overnight (~8 hours) or less.
  • Users prefer faster flow rates but may tolerate extended times (6 to 8 hours) needed to treat the total volume of water in a device.

Notes and exceptions

  • Turbidity and dissolved solids are key variables in source water and can determine the effectiveness and user satisfaction with HWTS products.
  • Filter elements may be made modular allowing adaptation to local conditions.

Supporting evidence